Astronomy
Constellations - Cancer - 21 Cnc

 
Identification Data
Common Name
ConstellationCancer
Star Name21 Cnc
Skymap Number8230213
Henry Draper (HD) Number70734
Harvard Revised (HR) Number3290
SAO Number97788
Durchmusterung (DM) NumberBD+11 1830
Washington Double Stars (WDS) Number
08239+1038
Positional Data
Position and Proper Motion (PPM) Number125216
Right Ascension (RA) J20008h 23m 55.210s
Declination (Dec) J2000+10° 37' 55.425"
Position Uncertainty0.0179s
Proper Motion in RA (J2000)/cos(Dec)+0.00025
Proper Motion in Dec (J2000)-0.022167
Radial Velocity+003.3km s-1
Trigonometric Parallax+0.00293s
Trigonometric Parallax Uncertainty0.00134s
GCI Unit Vector in X (J2000)-0.577417
GCI Unit Vector in Y (J2000)0.795329
GCI Unit Vector in Z (J2000)0.184501
Galactic Longitude213.68°
Galactic Latitude
25.32°
Observational Data
Observed Visual Magnitude (V)6.13
Derived Visual Magnitude
Derived Visual Magnitude or Observed Visual Magnitude Uncertainty0.006
Observed B Magnitude7.63
Observed B-V Colour+1.499
Observed B Magnitude or (B-V) Magnitude Uncertainty0.014
Observed U Magnitude
Observed U-B Colour
Observed U Magnitude or (U-B) Magnitude Uncertainty
Observed Photovisual Magnitude6.3
Observed Photographic Magnitude7.6
Morgan Keenan (MK) Spectral TypeM2III
One-Dimensional Spectral ClassK5
Position Angle260
Year of Observation1984. AD

Data Source
SKY2000 - Master Star Catalog - Star Catalog Database, Version 2
    Sande C.B., Warren Jr. W.H., Tracewell D.A., Home A.T., Miller A.C.
    (Goddard Space Flight Center, Flight Dynamics Division (1998))

 
Page compiled: Sun Sep 02 13:15:37 GMT+01:00 2001